Chris invests a total of $13,500 in two accounts. The first account earned a rate of return of 13% (after a year). However, the second account suffered a 11% loss in the same time period. At the end of one year, the total amount of money gained was $1,035.00 . How much was invested into each account?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.